Values not populating in Notification mail

Hi,

We have the below requirement.

1. In the earlier development we were showing only  Parked Document Number in the mail notification
2. Now we need to show Vendor# Account# etc.
3. I implemented below code

4. I created a structure in SE11 which is below

5. In PFTC I created a container element 'ZSF_APINV_TRANS'

    Assigned the structure created in SE11 which is 'ZSF_APINV_TRANS'.

6. Created binding for the structure for the step

7. After this I activated and run the interface – in the program we are getting values for ZSF_APINV_TRANS but the same values are not show in workflow(Notification mail)

Please suggest if any thing missing.

Regards,

Rafi